:root {
  --primary: #0b2a5b;
  --primary-700: #08214a;
  --primary-500: #1f4caf;
  --primary-50: #eef3fb;
  --text: #11192b;
  --text-muted: #56607a;
  --border: #e3e7ef;
  --bg: #ffffff;
  --bg-muted: #f5f7fa;
  --bg-dark: #0b2a5b;
  --radius: 10px;
  --shadow-sm: 0 1px 2px rgba(11, 42, 91, 0.05);
  --shadow-md: 0 6px 24px rgba(11, 42, 91, 0.08);
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 72px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--primary);
}
.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-500) 100%);
  position: relative;
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 6px;
  border-left: 2px solid #fff;
  border-top: 2px solid #fff;
  border-radius: 2px;
  transform: rotate(45deg);
  transform-origin: top left;
}
.brand-name { font-size: 15px; }

.nav {
  display: flex;
  gap: 26px;
  margin-left: auto;
}
.nav a {
  font-size: 14px;
  color: var(--text);
  font-weight: 500;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
}
.nav a:hover { color: var(--primary); border-color: var(--primary); }

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 600;
}
.lang-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 4px 6px;
  font: inherit;
  border-radius: 4px;
}
.lang-btn.active { color: var(--primary); }
.lang-btn:hover { color: var(--primary); }
.lang-sep { color: var(--border); }

.menu-toggle {
  display: none;
  background: none;
  border: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
  cursor: pointer;
}
.menu-toggle span {
  width: 22px;
  height: 2px;
  background: var(--primary);
  display: block;
}

/* Hero */
.hero {
  min-height: calc(100vh - 72px);
  display: flex;
  align-items: center;
  padding: 32px 0;
  background:
    radial-gradient(1200px 400px at 90% -20%, rgba(31, 76, 175, 0.07), transparent 60%),
    linear-gradient(180deg, #fbfcfe 0%, #ffffff 100%);
  border-bottom: 1px solid var(--border);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 48px;
  align-items: center;
  width: 100%;
}
.hero-text { max-width: 600px; }
.hero-art {
  width: 100%;
  max-width: 520px;
  max-height: calc(100vh - 160px);
  margin-left: auto;
}
.hero-art svg { width: 100%; height: 100%; max-height: inherit; display: block; }
.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary-500);
  background: var(--primary-50);
  padding: 6px 12px;
  border-radius: 999px;
  margin: 0 0 20px;
}
.hero h1 {
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--primary);
  margin: 0 0 16px;
  font-weight: 700;
}
.hero .lead {
  font-size: clamp(15px, 1.2vw, 17px);
  color: var(--text-muted);
  margin: 0 0 24px;
  max-width: 640px;
}
.hero .eyebrow { margin: 0 0 14px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background .15s, color .15s, border-color .15s, transform .05s;
  font-family: inherit;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover { background: var(--primary-700); border-color: var(--primary-700); }
.btn-ghost {
  background: transparent;
  color: var(--primary);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--primary-50); border-color: var(--primary-50); }
.btn:active { transform: translateY(1px); }

/* Sections */
.section { padding: 88px 0; }
.section-muted { background: var(--bg-muted); }
.section-dark { background: var(--primary); color: #fff; }
.section-dark .stat-value { color: #fff; }
.section-eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary-500);
  margin: 0 0 12px;
}
.section-eyebrow.light { color: #9bb3e6; }
h2 {
  font-size: clamp(26px, 3vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--primary);
  margin: 0 0 32px;
  font-weight: 700;
  max-width: 760px;
}
h2.light { color: #fff; }

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.about-text {
  margin: 0;
  color: var(--text-muted);
  font-size: 16px;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: #cfd6e3;
}
.card-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary-500);
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}
.card h3 {
  font-size: 17px;
  color: var(--primary);
  margin: 0 0 10px;
  font-weight: 600;
  line-height: 1.3;
}
.card p { margin: 0; color: var(--text-muted); font-size: 14.5px; }

/* Infrastructure */
.infra-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.infra-text p { color: var(--text-muted); margin: 0 0 16px; }
.infra-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 18px; }
.infra-list li {
  padding: 20px 22px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.infra-list h4 { margin: 0 0 6px; color: var(--primary); font-size: 15.5px; font-weight: 600; }
.infra-list p { margin: 0; color: var(--text-muted); font-size: 14.5px; }

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 8px;
}
.stat {
  padding: 28px 0;
  border-top: 1px solid rgba(255,255,255,0.18);
}
.stat-value {
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 14px;
  color: #bcd0f5;
}

/* Partners */
.partners-inner { display: grid; gap: 24px; max-width: 920px; }
.partners-text { margin: 0; color: var(--text-muted); font-size: 16.5px; max-width: 760px; }
.partners-tags {
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.partners-tags li {
  background: var(--primary-50);
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  padding: 8px 14px;
  border-radius: 999px;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.contact-grid p { color: var(--text-muted); margin: 0 0 24px; }
.contact-meta { display: grid; gap: 16px; margin-top: 16px; }
.meta-label { font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); font-weight: 600; }
.meta-value { color: var(--primary); font-weight: 600; }

.contact-form {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: grid;
  gap: 16px;
}
.field { display: grid; gap: 6px; }
.field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}
.field input,
.field textarea {
  font: inherit;
  padding: 11px 13px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  transition: border-color .15s, box-shadow .15s;
  resize: vertical;
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(31, 76, 175, 0.15);
}
.form-status {
  margin: 0;
  font-size: 14px;
  color: var(--primary-500);
  min-height: 20px;
}

/* Footer */
.site-footer {
  background: #fafbfd;
  border-top: 1px solid var(--border);
  padding: 28px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--primary);
  font-weight: 600;
}
.footer-copy { margin: 0; color: var(--text-muted); font-size: 14px; }

/* Responsive */
@media (max-width: 960px) {
  .nav { display: none; position: absolute; top: 72px; left: 0; right: 0; background: #fff; flex-direction: column; gap: 0; padding: 8px 0; border-bottom: 1px solid var(--border); }
  .nav.open { display: flex; }
  .nav a { padding: 14px 24px; border-bottom: 1px solid var(--border); }
  .menu-toggle { display: flex; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .infra-grid, .contact-grid, .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero-art { margin: 0 auto; max-width: 480px; }
  .section { padding: 64px 0; }
  .hero { padding: 64px 0 56px; }
}
@media (max-width: 560px) {
  .cards { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; gap: 12px; }
  .header-inner { gap: 12px; }
}